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in subjects: "Mechanical Tests"

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HIVELITE propellant characterization

No Description Available.

Date: March 14, 1975

Creator: Finger, M. & Hayes, B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Milliwatt Generator Project

This report covers progress on the Milliwatt Generator Project from April 1986 through March 1988. Activities included fuel processing and characterization, production of heat sources, fabrication of pressure-burst test units, compatibility studies, impact testing, and examination of surveillance units. The major task of the Los Alamos Milliwatt Generator Project is to fabricate MC2893A heat sources (4.0 W) for MC2730A radioisotope thermoelectric generators (RTGS) and MC3599 heat sources (4.5 W… more

Date: May 1, 1992

Creator: Latimer, T.W. & Rinehart, G.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Evaluation of weldments in Type 21-6-9 stainless steel for Compact Ignition Tokamak structural applications: Phase 1

Primary design considerations for the Compact Ignition Tokamak toroidal field-coil cases are yield strength and toughness in the temperature range from 77 to 300 K. Type 21-6-9 stainless steel, also still known by its original Armco Steel Company trade name Nitronic 40, is the proposed alloy for this application. It has high yield strength and usually adequate base metal toughness, but weldments in thick sections have not been adequately characterized in terms of mechanical properties or hot-cr… more

Date: June 1, 1991

Creator: Alexander, D. J.; Goodwin, G. M. & Bloom, E. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Optimization of a VISAR for measuring flyer-plate velocities

VISAR (Velocity Interferometer System for Any Reflector) is commonly used for measuring flyer-plate velocities up to 6 km/s. Flyer plates can travel as much as 1 mm, which is large compared to usual depth-of-focus requirements for VISARs. Flyer plates are explosively driven, or driven by some other very energetic means; as such, they must be tested in a chamber, which will contain the explosion. Routing the laser beam to the chamber and the signal beam to the VISAR can be done safely and easily… more

Date: May 6, 1992

Creator: Sweatt, W. C.; Crump, O. B., Jr. & Brigham, W. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Temperature and shock testing of lithium-organic electrolyte cells. [Li/LiAsF/sub 6/ + LiBF/sub 4/ in methyl formate/V/sub 2/O/sub 5/, Honeywell G2655, performance from -40/sup 0/ to +70/sup 0/C, shock levels up to 17,000 g's]

Honeywell G2655 lithium cells were tested over the temperature range -40/sup 0/ to +70/sup 0/C and subjected to shock levels up to 17,000 g's. Output at -40/sup 0/C was approximately 50 percent of that at +25/sup 0/C, while at +70/sup 0/C the output was 150 percent that at +25/sup 0/C. Shock had no noticeable effect on performance. 99 figures, 6 tables. (auth)

Date: January 1, 1976

Creator: Levy, S.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Milliwatt generator project: Progress report, April 1983--March 1984

This report covers progress on the Milliwatt Generator Project during April 1983--March 1984. Activities included (plutonium 238 oxide) fuel processing and characterization, production of heat sources, fabrication of pressure-burst test units, compatibility studies, impact testing, examination of surveillance units, Inconel weld development, and qualilty assurance.

Date: May 1, 1988

Creator: Rinehart, G.H. & Latimer, T.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Computational determination of ballistic limits for a simple Whipple bumper shield

A series of numerical simulations has been performed using the multi-dimensional hydrodynamics code CTH to computationally determine a ballistic limit for a Whipple bumper shield. The ballistic limit is generally characterized as a critical diameter such that particle diameters greater than the ballistic limit will generate debris clouds that will penetrate the rear wall and particle diameters less than the ballistic limit will not. The particular shield design used for these analyses is define… more

Date: January 1, 1991

Creator: Hertel, E.S.; Chhabildas, L.C.; Yarrington, L. (Sandia National Labs., Albuquerque, NM (United States)) & Hill, S.A. (National Aeronautics and Space Administration, Huntsville, AL (United States). George C. Marshall Space Flight Center)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

MHD power generation research, development and engineering. Quarterly progress report, October-December 1979

Progress is reported on the following tasks: characterization of coal for open-cycle MHD power generation systems; compressive creep and strength studies of MHD preheater materials; preparation of coals for utilization in direct coal-fired MHD generation; characterization of volatile matter in coal; MHD materials evaluation; operability of the Moderate Temperature Slag Flow Facility; slag-seed equilibria and separations related to the MHD system; thermionic emission of coal and electrode materi… more

Date: January 1, 1979

Item Type: Report

Partner: UNT Libraries Government Documents Department

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MC3644 detonator development status report for the period ending October 30, 1981

The MC3644 detonator is being developed as a replacement for the MC3132 flying plate detonator in the parachute deployment system of the B83 weapon. The MC3644 is a CP, deflagration-to-detonation transition device. Two models are being developed: an interim design using the MC3423 ignitor and a new production version with a one-piece ignitor/header assembly. Features of both designs are described. Results of development tests involving the interim design are presented. No-fire sensitivity test … more

Date: January 1, 1982

Creator: Jacobson, A. K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Space nuclear safety and fuels program. Progress report

This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems. These studies are conducted by Los Alamos National Laboratory for the Office of Coordination and Special Projects of the US Department of Energy. Because most of the studies discussed here are ongoing, results and conclusions may change as the work continues. Published reference of the results cited in this report should not be made without explicit permission from the person in… more

Date: January 1, 1982

Creator: Bronisz, S. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A semiautomated computer-interactive dynamic impact testing system

A computer-assisted semiautomated system has been developed for testing a variety of specimen types under dynamic impact conditions. The primary use of this system is for the testing of Charpy specimens. Full-, half-, and third-size specimens have been tested, both in the lab and remotely in a hot cell for irradiated specimens. Specimens are loaded into a transfer device which moves the specimen into a chamber, where a hot air gun is used to heat the specimen, or cold nitrogen gas is used for c… more

Date: January 1, 1989

Creator: Alexander, D.J.; Nanstad, R.K.; Corwin, W.R. & Hutton, J.T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Statistical analysis and planning of multihundred-watt impact tests

Modular multihundred-watt (MHW) radioisotope thermoelectric generators (RTG's) are used as a power source for spacecraft. Due to possible environmental contamination by radioactive materials, numerous tests are required to determine and verify the safety of the RTG. There are results available from 27 fueled MHW impact tests regarding hoop failure, fingerprint failure, and fuel failure. Data from the 27 tests are statistically analyzed for relationships that exist between the test design variab… more

Date: October 1, 1977

Creator: Martz, H.F. Jr. & Waterman, M.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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MESA 3-D calculations of armor penetration by projectiles with combined obliquity and yaw

We introduce and briefly describe MESA, a new 3-D hydrodynamic code, developed specifically for simulations of armor and anti-armor systems. The code's current capabilities an its planned model improvements and additions are discussed. An Eulerian code using state-of-the-art numerical methods, MESA runs faster and is less affected by spurious numerical diffusion than older codes. It models hydrodynamic flow and the dynamic deformation of solid materials. It uses simple elastic-perfectly plastic… more

Date: January 1, 1989

Creator: Cagliostro, D. J.; Mandell, D. A.; Schwalbe, L. A.; Adams, T. F. & Chapyak, E. J. (Los Alamos National Lab., NM (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Hypervelocity launch capabilities to over 10 km/s

Very high pressure and acceleration is necessary to launch flier plates to hypervelocities. In addition, the high pressure loading must be uniform, structured, and shockless, i.e., time-dependent to prevent the flier plate from either fracturing or melting. In this paper, a novel technique is described which allows the use of megabar level loading pressures, and 10{sup 9} g acceleration to launch intact flier plates to velocities of 12.2 km/s. 32 refs., 2 figs.

Date: January 1, 1991

Creator: Chhabildas, L.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experimental-analytical comparison of the ductile failure of notched tensile bars

Experimental results of the ductile failure of 7075-T6 aluminum notched tensile bars are compared with finite strain, nonlinear, finite element calculations. This comparison allows the investigation of mean stress dependent macroscopic theories for ductile fracture. Two such theories are examined and the results are presented in graphical form. 14 figures, 2 tables.

Date: October 1, 1977

Creator: Benzley, S.E.; Hickerson, J.P. & Priddy, T.G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Inertia, stability and ductility in uniaxial tension at high strain rate

The influence of inertia on the necking process in the dynamic tensile test has been studied. The equations of motion for a bar of finite length elongation dynamically have been written assuming a one-dimensional state of stress, and a model for rate independent or rate dependent flow has been presented. For rate dependent flow, a description of the stress-strain rate law that takes into account the increase of strain rate sensitivity in the dynamic range has been introduced. The growth of an a… more

Date: January 1, 1985

Creator: Regazzoni, G.; Follansbee, P.S. & Johnson, J.N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

System for vacuum pouring of epoxy tensile and impact specimens with a study of the behavior of these specimens at 77 K and 293 K

The purpose of the investigation was to establish a suitable technique for vacuum pouring of epoxy test specimens and to study the behavior of these specimens at 77 K and 293 K. A series of tensile and impact tests was conducted using specimens made from the following resins: Epon 828, Epon 871, and Epon curing agent Z. These materials are of general interest to designers of magnets for cryogenic service. Tests of the specimens were carried out at 77 K and 293 K. The 77 K data indicate that ten… more

Date: March 31, 1978

Creator: Fitzpatrick, C.M. & Stoddart, W.C.T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Flight-systems safety program. Progress report, March 1982

This technical monthly report covers studies related to the use of /sup 238/PuO/sub 2/ in radioisotope power systems carried out for the Office of Coordination and Special Projects of the US Department of Energy by Los Alamos National Laboratory. Most of the studies discussed here are ongoing. Results and conclusions described may change as the work continues. Published reference of the results cited in this report should not be made without the explicit permission of the person in charge of th… more

Date: July 1, 1982

Creator: Bronisz, S. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development of the freely expanding ring test for measuring dynamic material properties

Modifications to the freely expanding ring test for eliminating adverse two-dimensional effects are described and illustrated. The result is to substantially increase the strain-rate range over which dynamic material property data can be reliably obtained. Several different ring launching schemes are discussed, and data are presented that were taken with a particular shockless electromagnetic system. Results from initial attempts at measuring dynamic compressive properties with a contracting ri… more

Date: January 1, 1982

Creator: Warnes, R. H.; Karpp, R. R.; Duffey, T. A.; Carden, A. E. & Jacobson, J. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Milliwatt generator heat source. Progress report, July-December 1981

As part of the Milliwatt Generator (MWG) Program, a second series of pressure burst capsules welded offsite was tested; the resulting data indicate that the welds are very similar to those in the first series of capsules. Sufficient hardware was fabricated to meet all scheduled commitments. To provide a unit for feasibility testing, a heat source clad with Hastelloy C was reclad with Inconel 600. Forming development tests on Inconel 600 were conducted with favorable results. A QAS-3 survey was … more

Date: April 8, 1982

Creator: Mershad, E.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cladding creepdown under compression. [BWR; PWR]

Light-water power reactors use Zircaloy tubing as cladding to contain the UO/sub 2/ fuel pellets. In-service operating conditions impose an external hydrostatic force on the cladding, causing it to creep down into eventual contact with the fuel. Knowledge of the rate of such creepdown is of great importance to modelers of fuel element performance. An experimental system was devised for studying creepdown that meets several severe requirements by providing (1) correct stress state, (2) multiple … more

Date: November 9, 1977

Creator: Hobson, D.O.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Embrittlement of the Shippingport reactor shield tank

The irradiation embrittlement of the Shippingport neutron tank material has been characterized. Irradiation increases the Charpy transition temperature (CTT) by {approximately}25{degrees}C (45{degrees}F) and decreases the upper shelf energy. The shift in CTT is not as severe as that observed in the HFIR surveillance specimens. However, the actual value of CTT is higher than that for the HFIR data and the toughness at service temperature is low. The increase in yield stress is 51 MPa (7.4 ksi), … more

Date: October 1, 1989

Creator: Chopra, O. K. & Shack, W. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Hypothetical accident conditions, free drop and thermal tests: Specification 6M

The 30 gallon Specification 6M shipping container with rolled-top food pack cans as inner containers is evaluated under conditions required by 10 CFR 71.42. One kilogram of depleted uranium as UO/sub 2/ was packaged in each of the inner containers. After completion of a free drop test and a simulated thermal test, the maximum observed leakage of UO/sub 2/ for the following week was 3.2 ..mu..g. This leakage is well below the allowable leakage per week for most plutonium isotopic mixtures. Using… more

Date: May 1, 1980

Creator: Blankenship, R.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Crash test of a nuclear spent fuel cask and truck transport system

Sandia Laboratories has conducted a 96 kph (60 mph) full scale truck impact test for ERDA's Environmental Control Technology Division. Rockets propelled a 20, 500-kg (22-ton) cask mounted on its shipping trailer, coupled to a conventional cab-over tractor, into a massive, heavily reinforced concrete target. This summary report describes and compares the results of the computer analysis, scale model, and full scale tests.

Date: January 1, 1978

Creator: Huerta, M. & Yoshimura, R.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department